<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			.c1{
				color: red;
			}
			.c2{
				letter-spacing: 5px;
			}
			.con{
				width: 400px ;
				height: 150px;
				border: #000000 1px solid;
			}
			.c3{
				line-height: 150px;
				text-align: center; /* 盒子是con */
			}
			.c4{
				text-indent: 2em;
			}
			.c5{
				text-align: center; /* 盒子是body */
			}
		</style>
	</head>
	<body>
		<div class="c1">aaaaa啊啊啊啊啊</div>
		<div class="c2">aaaaa啊啊啊啊啊</div>
		<div class="con">
			<div class="c3">aaaaa啊啊啊啊啊</div>
		</div>
		<div class="c4">aaaaa啊啊啊啊啊</div>
		<div class="c5">aaaaa啊啊啊啊啊</div>
	</body>
</html>
